635664004 has 6 divisors (see below), whose sum is σ = 1112412014. Its totient is φ = 317832000.

The previous prime is 635663999. The next prime is 635664011. The reversal of 635664004 is 400466536.

635664004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 540562500 + 95101504 = 23250^2 + 9752^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79457997 + ... + 79458004.

Almost surely, 2^635664004 is an apocalyptic number.

It is an amenable number.

635664004 is a deficient number, since it is larger than the sum of its proper divisors (476748010).

635664004 is a wasteful number, since it uses less digits than its factorization.

635664004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158916005 (or 158916003 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 635664004 is about 25212.3779917722. The cubic root of 635664004 is about 859.8232934219.

The spelling of 635664004 in words is "six hundred thirty-five million, six hundred sixty-four thousand, four".